DE3463884D1 - Descrambler for television pictures scrambled by circular permutation - Google Patents
Descrambler for television pictures scrambled by circular permutationInfo
- Publication number
- DE3463884D1 DE3463884D1 DE8484200256T DE3463884T DE3463884D1 DE 3463884 D1 DE3463884 D1 DE 3463884D1 DE 8484200256 T DE8484200256 T DE 8484200256T DE 3463884 T DE3463884 T DE 3463884T DE 3463884 D1 DE3463884 D1 DE 3463884D1
- Authority
- DE
- Germany
- Prior art keywords
- descrambler
- scrambled
- circular permutation
- television pictures
- pictures
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N11/00—Colour television systems
- H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
- H04N7/169—Systems operating in the time domain of the television signal
- H04N7/1696—Systems operating in the time domain of the television signal by changing or reversing the order of active picture signal portions
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Facsimile Transmission Control (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8303112A FR2541841A1 (fr) | 1983-02-25 | 1983-02-25 | Dispositif de dechiffrement d'images de television brouillees par application aux signaux video de permutations circulaires |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3463884D1 true DE3463884D1 (en) | 1987-06-25 |
Family
ID=9286264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8484200256T Expired DE3463884D1 (en) | 1983-02-25 | 1984-02-22 | Descrambler for television pictures scrambled by circular permutation |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0126495B1 (de) |
JP (1) | JPS59196676A (de) |
DE (1) | DE3463884D1 (de) |
FR (1) | FR2541841A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2607341A1 (fr) * | 1983-03-21 | 1988-05-27 | Telediffusion Fse | Procede d'embrouillage et de desembrouillage pour images de television |
FR2575891B1 (fr) * | 1985-01-08 | 1987-02-20 | Labo Electronique Physique | Dispositif de decodage et de dechiffrement de signaux ayant subi un codage de type mac et un chiffrement par permutation circulaire autour d'un ou de deux points de coupure, et dispositif de codage et de chiffrement fonctionnant de facon similaire |
DE3751410T2 (de) * | 1986-04-18 | 1996-04-11 | Nagra Plus Sa | Decoder für ein Fernsehgebührensystem. |
FR2665602A1 (fr) * | 1990-08-03 | 1992-02-07 | Europ Rech Electr Lab | Procede de protection contre le desembrouillage non autorise d'emissions de television embrouillees et dispositif de mise en óoeuvre. |
SE466727B (sv) * | 1991-04-04 | 1992-03-23 | Persson Bjoern | Tv-signaloeverfoerande betal-tv-system |
MY108367A (en) * | 1991-09-30 | 1996-09-30 | Thomson Consumer Electronics S A | Method and apparatus for secure transmisson of video signals. |
CA2094228C (en) * | 1992-04-17 | 2000-06-20 | Masayoshi Hirashima | Video recorder |
TW284962B (de) * | 1992-09-04 | 1996-09-01 | Matsushita Electric Ind Co Ltd |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2431809A1 (fr) * | 1978-07-20 | 1980-02-15 | Telediffusion Fse | Procedes et dispositifs de brouillage et de debrouillage pour images de television |
-
1983
- 1983-02-25 FR FR8303112A patent/FR2541841A1/fr active Granted
-
1984
- 1984-02-22 DE DE8484200256T patent/DE3463884D1/de not_active Expired
- 1984-02-22 EP EP19840200256 patent/EP0126495B1/de not_active Expired
- 1984-02-25 JP JP3338584A patent/JPS59196676A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2541841B1 (de) | 1985-04-19 |
JPS59196676A (ja) | 1984-11-08 |
FR2541841A1 (fr) | 1984-08-31 |
JPH0556076B2 (de) | 1993-08-18 |
EP0126495B1 (de) | 1987-05-20 |
EP0126495A1 (de) | 1984-11-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |